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H.- W. MOWRY. COMPofBoARD.

NITED STATES Paritair Fries.

HARLEY W. MOWRY, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO WILLIAM- I-I.COOPER, OF SAME PLACE.

COMPO BOARD.

SPECIFICATION forming part of Letters Patent No. 516,572, dated March13, 1894,

To all whom it may concern:

' Beit known that I, HARLEY W. MOWRY, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and- I5 for its object to providean improved article of this class.

To this end,the invention consistsof the special constructionhereinafter fully described and particularly defined in the claims.

My invention is illustrated in the accompanying drawings, wherein, likeletters referring to like parts- Figure lis a plan view ot' a piece ofmy improved compo-board, with some parts broken z5 away and othersremoved, for better illustrating the construction. Fig. 2 is aperspective view of a piece of board,with some parts broken away, andothers removed. Fig. 3 is a vertical longitudinal section, on the line X3o X of Fig. l; and Fig. 4 is a view similar to Fig. 3, on a smallerscale, showing the compoboard with one of its facings composed ofasbestus paper.

Referring to Figs. l, 2 and 3, A A' repre- 3 5 sent paper-board facings,composed of comparatively stiff straw or wood pulp-board embracing awooden body composed of parallel closely laid cross rods B and marginallongitudinal binding strips B; and C is a setting 4o of cement, whichbinds together all the parts of the said Wooden body and the said paperfacings to the wooden body, uniting the whole into an integral solidboard. The marginal binding strips B' are of flat form and abut againstthe ends of the wooden rods B.

In manufacturing the compo-board, the ordinary wood or stock lumberisresawed to onequarter or three-eighth inch strips or boards, which arethen runthrough a mold ing machine 5o or sticker to form the rods B. Themarginal strips B', are also prepared of the proper di- Applicationfiled March 7, 1893. Serial No. 464,990. (N0 SPSGIHGHSJ mensions in anysuitable way. Ordinary straw board building papers may be used for thepaperfacings. The paper-boardispreferably cut to a width of thirty-twoinches; and the length of the wooden-rods B, and the width of themarginal binding strips B', are such as to make up the wooden body ofthe same width as the facings. The lower facing A, is then laid out on aflat surface,such as atable, and 6o a liberal quantity of the cement Cis spread over the same in a hot semi-liquid condition. The rods B andthe marginal binding strips B', are then laid in the cement, on the topof the lower facing A.- An additional amount of hot semi-liquid cementis then spread over the wooden body made up of the rods B and strips B',care being taken to fill up all the joints, crevices and openings, andto bring the top of the body of the cement to a com- 7o parativelyuniform level. The top facing A is then applied, while the cement is yetin a plastic condition. The whole composite material is then placedbetween the bed and platen of a powerful press and subjected to 7 5heavy pressure. The pressure is applied for a sufficient length of time,to permitthe cement to set and dry out to a considerable extent. Whenthus made, all the parts will be united by the cement into an integralsolid So board. The cement employed is preferably composed of glue andWhiting of about the consistency of paste paint. This cement willreadily setand dry; and when set and dried is of a hard and stonycharacter. The composition or composite structure,` composed of theelements above noted and formed as above described, constitutes acompo-board, which is rigid, strong and durablev and which may behandled like ordinarylnm- 9o ber. The fact that the wooden cross stripsare composed of rods instead of slats which are flat or rectangular incross section, gives space for a larger body of cement, affordinggreater strength in the binding material and 9 5 greater rigidity to thecompo-board. The addition of the marginal strips B' abutting the ends ofthe cross-rods B, serves to bind the rods together, under the bindingaction of the cement, and acts as a longitudinal brace, roo giving alarge amount of additionalstrength tothe compo-board; and these marginalstrips B are of a special value for the application of the nails, tosecure the c01npo-board in position, and for forming close and finishedjoints. Without such a strip as B', for nail ing purposes, it would benecessary, as has been found in practice with rectangular cross strips,to nail every rod B, requiring a much larger amount of expense in time,labor and quantity of nails required, and avoids splitting of the rods.i

Instead of making both paper-board facings A A of straw-board, Isubstitute, where tire-proong is required, one or more facings ofasbestus paper, as shown at .A2 in Fig. 4; or if so desired, bothfacings may be made of such asbestus paper.

A compo-board, such as I have above described, is capable of a widerange of use, but is especially serviceable as a substitute for lath andplaster in buildings, and is well adapted, both for inside and outsidewalls of the same.

When the compo-boards are placed in position, properly jointed with theuse of a little 3 cement or glue applied to the edges of the j same, aperfectly tight wall will be formed well adapted for the application ofeither paint or paper.

Such a compo-board is Well adapted for portable houses, enabling thesame to be quickly taken down and put together. It is also serviceablefor roofing with the use of battens ever the joints. It makes a goodsurface. for the application of a slate paint, for use `as ablack-board. It is sufficiently strong and rigid to be used as doors,trunks, sample cases, &c. In short, this compo-board may be usedgenerally in the arts where a lumberboard of like thickness could beemployed and in many uses, for which said strips ot lumber would beunfitted. The fact that it is impervious to air and by the applicationof a water-proof paint may be made impervious to water, renders the samean excellent medium for use in buildings.

The article can be made at a comparatively low cost, so as to render itsuse commercially practicable.

Waste lumber from wood working establishments, such as from sash andblind factories, may be utilized as material for the Wooden rods B.

Vhat I claim, and desire to secure bynLetters Patent of the UnitedStates, is as follows:

l. A compo-board, comprising a woodenbody, consisting of parallelclosely laid crossstrips and longitudinal marginal binding stripsabutting the ends of said cross strips, in the same horizontal planetherewith paperboard facings embracing the said woodenbody, and asetting of cement binding all of the said parts together into anintegral and solid board, substantially as described.

2. A compo-board, comprising a Wooden body, consisting of parallel crossrods and flat marginal strips abutting the ends ot' the rods,paper-board facings embracing said wooden body, and a setting of cementbinding together all of the said parts, into an integral and solidboard, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HARLEY W. MOWRY. lVitnesses:

JAS. F. WILLIAMSON, EMMA F. ELMORE.

